FORK_FORK
if (fork1(p, FORK_FORK, start_init, NULL, NULL, &initproc))
flags = FORK_FORK;
KASSERT((flags & ~(FORK_FORK | FORK_VFORK | FORK_PPWAIT | FORK_PTRACE
if (flags & FORK_FORK) {
if (pr->ps_flags & PS_TRACED && flags & FORK_FORK)